According to a New York Police Department source, Dr. Prabhjot Singh, who is Sikh and wears a turban and a beard, was attacked at 8:15 p.m. while walking along 110th Street near Lennox Avenue in upper Manhattan.

Last week, I was among several dozen Muslims who attended an iftar at the White House with President Obama. This has now become an annual tradition where the President extends greetings to the Muslim community and occasionally chooses to speak to other relevant issues.

Army veteran Wade Michael Page killed six people and then himself one Sunday morning at a Sikh temple near Milwaukee, Wis., as number of people gathered there for services last August. The attack is being treated as a hate crime and is considered by the FBI to be domestic terrorism.

So let me start with the standard roll call: As an American Muslim, I condemn all violence in the name of religion. Terrorism has no religion and Islam is no exception. If the Tsarnaev brothers are guilty of the Boston bombings, then I hope they are brought to justice.

In an essay at Salon, Chris Stedman, an interfaith leader, assistant chaplain at Harvard, and author of the memoir “Faitheist,” urged the company to reconsider its support for provocative AFDI ads that pitted Muslims and gays against each other.

Sometimes expressions of community manifest at unexpected yet necessary moments. Illustrative is the American response to the recent proliferation of anti-Muslim hate advertisements on government owned public transit systems in cities around the country.